%0 Conference Paper %B Ground-based and Airborne Instrumentation for Astronomy VII %D 2018 %T Overview of the Dark Energy Spectroscopic Instrument %A Martini, Paul %A Bailey, Stephen %A Besuner, Robert W. %A David Brooks %A Doel, Peter %A Edelstein, Jerry %A Eisenstein, Daniel %A Flaugher, Brenna %A Gutierrez, Gaston %A Harris, Stewart E. %A Honscheid, Klaus %A Jelinsky, Patrick %A Joyce, Richard %A Kent, Stephen %A Levi, Michael %A Prada, Francisco %A Poppett, Claire %A Rabinowitz, David %A Rockosi, Constance %A Cardiel Sas, Laia %A Schlegel, David J. %A Schubnell, Michael %A Sharples, Ray %A Silber, Joseph H. %A Sprayberry, David %A Wechsler, Risa %X The Dark Energy Spectroscopic Instrument (DESI) is under construction tomeasure the expansion history of the Universe using the Baryon AcousticOscillation technique. The spectra of 35 million galaxies and quasarsover 14000 square degrees will be measured during the life of theexperiment. A new prime focus corrector for the KPNO Mayall telescopewill deliver light to 5000 fiber optic positioners. The fibers in turnfeed ten broad-band spectrographs. We present an overview of theinstrumentation, the main technical requirements and challenges, and thecurrent status of the project. %B Ground-based and Airborne Instrumentation for Astronomy VII %V 0702 %8 July 1, 2018 %@ 9781510619579 %G eng %U http://adsabs.harvard.edu/abs/2018SPIE10702E..1FM %3 10.1117/12.2313063